Bill, I have a bunch of pictures and would like to add to your writeup. It has been several years since I have added pictures, I will figure out how to do it . In the mean time, anyone give any help with troubleshooting? This is with vac advance for a carb. Pickup coil ohms at 250 ohms when not spinning (0.25 on 20K scale). It does change resistance when I spin the shaft. When I put the meter in continuity test, I can make the buzzer beep when I spin it. I am using BWD module # CB4P. According to this website, it checks out OK on ohms and voltage. http://gpzweb.s3-website-us-east-1.amazonaws.com/Ignition/HeiModules/HeiModules.html I have it test wired on my bench and it will not fire a coil/sparkplug. Using the wiring diagram in the other thread G = Pickup black W= Pickup yellow ( I even tried to reverse) B = 12 V and Coil + C = Coil - Bench testing seems fine. I got it to fire the motor one time and it sounded a little weak. Seemed like it needed more advance. I jumped a tooth both ways and now it won't fire in any position. One thing I noticed was that the module does not fire the coil consistently. (tested by going Battery + to Coil - with a light). Sometimes it is a long solid fire, other times it is just not steady. The motor will sputter while I crank, but it will not catch. Module has steady 12V in start and run. The wiring is still temporary, could it just be induced voltage from plug wires?